post https://api.postgrid.com/v1/addver/verifications/batch
Verify up to 2000 addresses (both freeform and structured) with a single API call.
Note that valid addresses are either strings or objects containing the structured address fields (line1, line2, etc).
If your batch is larger than your free limit and you are not yet subscribed, the entire batch will fail to verify. You can send in a batch no larger than the remaining number of lookups in that case.
Uses 1 lookup per address provided.